Complete the paragraph by applying the laws of conservation of energy and matter to the interactions between Earth’s subsystems. According to the law of conservation, both energy and matter are _1_
in natural systems. Earth as a whole is a _2_ system, in which energy and matter can move from one subsystem to another.
As energy and matter are transferred between subsystems, different forms of matter and energy interact. For example, during photosynthesis, carbon is transferred from the _3_ into the biosphere, while radiant energy from _4_ is being converted into chemical energy. During this process, the amount of carbon remains constant, but some of the radiant energy is transformed into _5_ energy.

1. Conserved
Created
Destroyed

2. Open
Closed
Unnatural

3. Hydrosphere
Atmosphere
Geosphere

4. the moon
the Earth
the sun

5. Mechanical
electrical
heat